mace6 crash

[ami_stuff]

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(gdb) r -acodec mace6 -i test.shn -f null
Starting program: d:\mingw\msys\1.0\ffmpeg-head-ab7d6cb\ffmpeg_g.exe -acodec mac
e6 -i test.shn -f null
[New Thread 4048.0xbc]
ffmpeg version 0.10.2.git-ab7d6cb Copyright (c) 2000-2012 the FFmpeg developers
  built on May 30 2012 13:37:47 with gcc 4.6.1
  configuration: --disable-ffprobe --enable-gpl
  libavutil      51. 55.100 / 51. 55.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.101 / 54.  6.101
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[mace6 @ 03bbc7c0] Warning: not compiled with thread support, using thread emula
tion

Program received signal SIGFPE, Arithmetic exception.
0x00801678 in mace_decode_frame (avctx=0x3bbc7c0, data=0x22f6e8,
    got_frame_ptr=0x22f8a8, avpkt=0x22f658) at libavcodec/mace.c:255
255         ctx->frame.nb_samples = 3 * (buf_size << (1 - is_mace3)) / avctx->ch
annels;
(gdb) bt
#0  0x00801678 in mace_decode_frame (avctx=0x3bbc7c0, data=0x22f6e8,
    got_frame_ptr=0x22f8a8, avpkt=0x22f658) at libavcodec/mace.c:255
#1  0x00542887 in avcodec_decode_audio4 (avctx=0x3bbc7c0, frame=0x22f6e8,
    got_frame_ptr=0x22f8a8, avpkt=0x22f860) at libavcodec/utils.c:1576
#2  0x0046feda in try_decode_frame (st=0x3bc11e0, avpkt=<optimized out>,
    options=<optimized out>) at libavformat/utils.c:2319
#3  0x00477dae in avformat_find_stream_info (ic=0x3bb2340, options=0x3bc13c0)
    at libavformat/utils.c:2635
#4  0x0040ab87 in opt_input_file (o=0x22fdc8, opt=0x3bc0e42 "i",
    filename=<optimized out>) at ffmpeg.c:4327
#5  0x00413a7f in parse_option (optctx=0x22fdc8, opt=<optimized out>,
    arg=0x3bc0e44 "test.shn", options=0xb74bc0) at cmdutils.c:305
#6  0x00413ce2 in parse_options (optctx=0x22fdc8, argc=7,
    argv=<optimized out>, options=0xb74bc0,
    parse_arg_function=0x410748 <opt_output_file>) at cmdutils.c:338
#7  0x00b12ef5 in main (argc=7, argv=0x3bc0db0) at ffmpeg.c:5906
(gdb)